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Constant-speed circular motion still has centripetal acceleration.
In SHM, displacement, velocity, acceleration are sinusoidal, 90° out of phase.
For small swings, period depends on length and g — not mass or amplitude.
Mass on an ideal spring undergoes SHM — period set by m and k.
KE and PE swap but their sum stays constant; total energy ∝ A².
Damping shrinks amplitude; driving at natural frequency causes resonance.
PV = nRT unifies P, V, T for an ideal gas.
Gas pressure arises from molecular collisions with the container walls.
Temperature is a direct measure of average molecular kinetic energy.
Energy conservation: heat in equals internal-energy change plus work done.